Physics
A given volume of alcohol and the same volume of water are heated from the room temperature to the same temperature then:
- alcohol contracts, but water expands
- water contracts, but alcohol expands
- water expands more than alcohol
- alcohol expands more than water
Heat Energy
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Answer
alcohol expands more than water
Reason — Equal volumes of different liquids when heated to same temperature expand by different amount. Expansion of a liquid depends upon its coefficient of linear expansion (γ).
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Related Questions
Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from 0°C to 100°C. Then:
- both the rods A and B elongate the same
- the rod A elongates more than the rod B
- the rod B elongates more than the rod A
- the rod A elongates, but the rod B contracts
Two rods A and B of the same metal, same length, but one solid and other hollow, are heated to the same rise in temperature. Then:
- the solid rod A expands more than the hollow rod B
- the hollow rod B expands more than the solid rod A
- the hollow rod B contracts, but the solid rod A expands
- both the rods A and B expand the same
The increase in length of a metal rod depends on:
- the initial length of the rod only
- the rise in temperature only
- the material of the rod only
- all the above three factors
The correct statement is:
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- A glass stopper gets tightened on warming the neck of the bottle.
- Telephone wires sag in winter, but become tight in summer.
- A little space is left between two rails on a railway track.